Kent Police said that more than a hundred people were stuck for more than four hours on the A2 at Lydden near Dover after a lorry jack-knifed.
Once the lorry was cleared from the countbound carriageway, snow drifts built up, in some places up to a metre high due to strong winds.
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Thursday morning's weather for the east of the region
Thursday morning's weather for the west of the region
Wednesday evening's Pollen Forecast